These structures are smaller than the UGI Planetary Shields and require much less energy. However they only protect cities and military installations from attacks. They give off a still .9 yottawatts of power.
These structures push out enough energy to successfully shield a city, and they do so with ease. They don't shut down easily and they have also been seen hard to destroy. They were designed to protect a large amount of area and ensure its survival. With enough power these structures can provide a shield strong enough to repel antimatter weaponry but it will lose considerable shield strength.